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Making an apple iii replica

Hi guys i'm making an apple iii replica using nothing but the original apple iii schematics. Here is the I/O logic board section. I think its nearly fully complete. It took a few days to make just the I/O logic schematic on easyeda lol
 

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  • Schematic_apple-iii_2025-08-18v3.png
    Schematic_apple-iii_2025-08-18v3.png
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Nice work.
After that, someone should create a replica plastic case too :D
I guess this would be my only chance to finally have an Apple /// at a reasonable price :D
 
You could look at the code in MAME -- we know that's functional, and it's documented. It should at least tell you how all the components in your schematic are supposed to behave.
 
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